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.TH CURLOPT_SSH_KEYDATA 3 "January 02, 2023" "libcurl 7.88.1" "curl_easy_setopt options"

.SH NAME
CURLOPT_SSH_KEYDATA \- pointer passed to the SSH key callback
.SH SYNOPSIS
.nf
#include <curl/curl.h>

CURLcode curl_easy_setopt(CURL *handle, CURLOPT_SSH_KEYDATA, void *pointer);
.fi
.SH DESCRIPTION
Pass a void * as parameter. This \fIpointer\fP will be passed along verbatim
to the callback set with \fICURLOPT_SSH_KEYFUNCTION(3)\fP.
.SH DEFAULT
NULL
.SH PROTOCOLS
SFTP and SCP
.SH EXAMPLE
.nf
static int keycb(CURL *easy,
                 const struct curl_khkey *knownkey,
                 const struct curl_khkey *foundkey,
                 enum curl_khmatch,
                 void *clientp)
{
  /* 'clientp' points to the callback_data struct */
  /* investigate the situation and return the correct value */
  return CURLKHSTAT_FINE_ADD_TO_FILE;
}
{
  curl_easy_setopt(curl, CURLOPT_URL, "sftp://example.com/thisfile.txt");
  curl_easy_setopt(curl, CURLOPT_SSH_KEYFUNCTION, keycb);
  curl_easy_setopt(curl, CURLOPT_SSH_KEYDATA, &callback_data);
  curl_easy_setopt(curl, CURLOPT_SSH_KNOWNHOSTS, "/home/user/known_hosts");

  curl_easy_perform(curl);
}
.fi
.SH AVAILABILITY
Added in 7.19.6
.SH RETURN VALUE
Returns CURLE_OK if the option is supported, and CURLE_UNKNOWN_OPTION if not.
.SH "SEE ALSO"
.BR CURLOPT_SSH_KEYDATA "(3), " CURLOPT_SSH_KNOWNHOSTS "(3), "